This new Commentary provides a scientific assessment of the production potential and regional impacts of large-scale cellulosic ethanol production.It discusses the need for national investments and policy changes to address challenges limiting the production and efficient use of cellulosic biomass as a fuel feedstock to meet U.S. needs.Chair: Dr. Steven L. Fales, Iowa State University, Ames.QTA2007-2, 8 pp., November 2007.AVAILABLE ONLINE ONLY.